55151920087501 has 16 divisors (see below), whose sum is σ = 57068103751168. Its totient is φ = 53244312811200.

The previous prime is 55151920087399. The next prime is 55151920087507. The reversal of 55151920087501 is 10578002915155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55151920087501 - 2²³ = 55151911698893 is a prime.

It is a super-2 number, since 2×55151920087501² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55151920087507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600652471 + ... + 600744283.

It is an arithmetic number, because the mean of its divisors is an integer number (3566756484448).

Almost surely, 2^{55151920087501} is an apocalyptic number.

It is an amenable number.

55151920087501 is a deficient number, since it is larger than the sum of its proper divisors (1916183663667).

55151920087501 is a wasteful number, since it uses less digits than its factorization.

55151920087501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138292.

The product of its (nonzero) digits is 630000, while the sum is 49.

The spelling of 55151920087501 in words is "fifty-five trillion, one hundred fifty-one billion, nine hundred twenty million, eighty-seven thousand, five hundred one".